PMM
Non-corroding
Non-corrodingcooling
coolingtowers
towers
PMM
Series
PMM Series cooling towers
 PMM Series cooling towers
The PMM series, proposed in big-size plants, are open circuit counterflow
cooling towers composed of pre-assembled modules. Each unit is engineered according to the technical data of the relevant project.
Capacity from 2.6 to 14 MW (approximate values referred to one cell, 5°C
temperature range, 19 mm fill pack), modular systems. This particular design
grants a quick and inexpensive final installation, minimizing the erection times
and costs.
The PMM range can be engineered, in many cases, to fit to existing basins
or structures.
 Fields of application
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Steel mills and metals manufacturing in general
Energy production facilities
Chemical and pharmaceutical plants
Food industry
Air conditioning systems (for shopping malls, hospitals, exhibition halls,
etc...)
• Technical gas production facilitie
 Constructive characteristics
• Non-corroding tower casing, made up of fibreglass sandwich panels
• Supporting frames made of thick steel, hot dip galvanized after all the
processing
• Fill packs (heat exchanging surface) with different types of air/water
channels, suitable for the use with various water qualities
• Certified PP Drift eliminators (drift loss 0.01%)
• Water distribution system in PVC/PP/PE and PP non-clogging spray nozzles
• Each unit can be supplied with one or more removable walls/access
doors in order to allow quick and easy inspection and maintenance
operations
• Fibreglass fan stack in segments, giving the possibility to access the fan
area in a fast, simple and safe way
• Axial motor fan system with mechanical gearbox and transmission shaft,
low installed motor power, low noise levels
• IP56 motor, located outside the air flow, easy to access
 Special versions
All PMM series cooling towers are assembled with different heat exchange
fill packs selected according to the type of water to be cooled and the customer’s needs.
The fill packs used by TORRAVAL (internally tested in the own test station)
are composed of self-extinguishing PVC sheets or thermoformed PP, available with different geometries depending on the characteristics of water:
• 19 mm (PVC o PP)
Panels for industrially clean water, with maximum temperatures of +55°C
(PVC) and peaks up to +80°C (PP)
• GS-L (PVC also available for high temperatures)
Panels for dirty water, developed by MITA to provide maximum heat transfer by combining an effective splash effect to a film component
• GS (PP)
Grids for very dirty water (suspended solids and colloids with a diameter
<200/300 microns, concentration <1000 mg / l) and with a maximum peak
temperature of +80°C
Certificación ASTM E-84
Construction details
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Structure and casing
Material:
Bearing frame in hot-dip galvanized
steel after all works, FRP sandwich
panels
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Fan stack
Material:
PRFV
Characteristics:
•Non-corroding
Filling material (or heat exchange
surface)
Material:
Self-extinguishing PVC
Characteristics:
• Laminar: clean water/industrial water
• Semi-splash: dirty water
• Splash: very dirty water
Mechanical equipment
• High performance axial fan made
of FRP or aluminum. They are both
statically and dynamically balanced.
The blade angle is adjustable while
the ventilator is stopped.
Low noise level under request
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Gear box designed to be use in
cooling towers, able to withstand the
conditions of the air stream saturated with humidity
Totally enclosed and self-ventilated
motors installed at the upper deck,
out of the air current
Transmission of galvanized steel or
composite and flexible disc coupling
of stainless steel
Hot water distribution system
Material:
PN 10 unified PVC pipes,
polypropylene nozzles
Characteristics:
•Non-corroding
• Uniform and total spraying of the
heat exchange filling pack
• MITA* exclusive nozzles design,
with nonclogging wide passages
for a full cone spray
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Removable walls and/or manholes
Material:
FRP sandwich panels
Characteristics:
•Non-corroding
Drift eliminator
Material:
PP (Eurovent certified)
Characteristics:
• High efficiency
Ladder and bandrail
Material:
HDGS, Stainless steel or FRP
Characteristics:
•Non-corroding
Bolts, nuts and washers
Material:
Stainless steel 304
Characteristics:
•Non-corroding
Anti-splash louvers on air Intake
openings
Material:
PRFV o PVC
Characteristics:
•Non-corroding
* TORRAVAL is part of MITA Group
PMM eng • 12-13
PMM Series cooling towers
www.mita-tech.it
TORRAVAL Cooling, S.L.
Pol. Ind. Torrelarragoiti, P9-A • E-48170 ZAMUDIO (Vizcaya), Spain • Ph. +34 94.452.00.00 • Fax +34 94.452.00.50
NIF / VAT : ES B48926422 • e-mail: info@torraval.com • www.torraval.com